CN110474314A - A kind of shunt capacitor overvoltage absorbing device - Google Patents
A kind of shunt capacitor overvoltage absorbing device Download PDFInfo
- Publication number
- CN110474314A CN110474314A CN201910826403.4A CN201910826403A CN110474314A CN 110474314 A CN110474314 A CN 110474314A CN 201910826403 A CN201910826403 A CN 201910826403A CN 110474314 A CN110474314 A CN 110474314A
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- China
- Prior art keywords
- overvoltage
- shunt capacitor
- circuit
- capacitor
- pressure limiting
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- 239000003990 capacitor Substances 0.000 title claims abstract description 77
- 230000000694 effects Effects 0.000 claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention discloses a kind of shunt capacitor overvoltage absorbing device, and overvoltage absorbing device is connect with shunt capacitor branch circuit parallel connection；Overvoltage absorbing device includes: pressure limiting circuit, and end of incoming cables is connect with the end of incoming cables of scene switch, and the leading-out terminal connection of leading-out terminal and capacitor absorbs electric energy when shunt capacitor branch line overvoltage for controlling the Overvoltage Amplitude of shunt capacitor branch；Resistance-capacitance circuit is connected in parallel with pressure limiting circuit, and for slowing down the rate of climb of overvoltage, storage shunt capacitor branch throws the electric energy for moving back and generating overvoltage.The present invention provides a kind of shunt capacitor overvoltage absorbing devices, slow down the rate of climb of overvoltage using resistance-capacitance circuit, the amplitude of overvoltage when moving back is thrown using pressure limiting circuit limitation shunt capacitor branch, by Overvoltage Amplitude control in an ideal range, it effectively avoids, reduce the throwing of shunt capacitor branch when moving back, impact and negative effect of the overvoltage of generation to electrical equipment and power grid.
Description
Technical field
The present invention relates to high voltage reactive compensation fields, more particularly to a kind of shunt capacitor overvoltage absorbing device.
Background technique
With the fast development of China's electric power, the needs of electric network reactive compensation are more and more vigorous, especially need 10-
35KV system largely installs and uses parallel capacitor group；When switching parallel capacitor group, it may appear that very big high frequency
All there is huge threat in the insulation of overvoltage, breaker, switchgear that this high frequency overvoltage pair is connected with capacitor, to electricity
Net and equipment operation bring very big negative effect.
Summary of the invention
The object of the present invention is to provide a kind of shunt capacitor overvoltage absorbing devices, slow down electricity in parallel by resistance-capacitance circuit
Container branch throws the rate of climb of overvoltage when moving back, and limits the overvoltage width when throwing of shunt capacitor branch is moved back by pressure limiting circuit
Value is serious to the negative effect of power grid and electrical equipment with the high frequency overvoltage generated when solving switching parallel capacitor group
The problem of.
To achieve the above object, the present invention provides following schemes:
A kind of shunt capacitor overvoltage absorbing device, the overvoltage absorbing device and shunt capacitor branch circuit parallel connection connect
It connects, wherein the shunt capacitor branch includes scene switch and capacitor, the end of incoming cables and high voltage bus that the scene switchs
Connection；The leading-out terminal of the scene switch is connect with the end of incoming cables of the capacitor, the leading-out terminal ground connection of the shunt capacitor；
The overvoltage absorbing device includes:
Pressure limiting circuit, the end of incoming cables of the pressure limiting circuit are connect with the end of incoming cables of the scene switch, the pressure limiting circuit
Leading-out terminal connect with the leading-out terminal of the capacitor；The pressure limiting circuit is used to absorb shunt capacitance in overvoltage effect
Electric energy when device branch line overvoltage controls the voltage of the shunt capacitor branch；
Resistance-capacitance circuit is connected in parallel with the pressure limiting circuit, for storing because of the shunt capacitance in overvoltage effect
Device branch throws the electric energy for moving back the overvoltage of generation.
Optionally, the pressure limiting circuit is variable resistance.
Optionally, the variable resistance is znr device.
Optionally, the resistance-capacitance circuit specifically includes:
Resistance is connect with the end of incoming cables of the scene switch；
Capacitor, end of incoming cables are connect with the leading-out terminal of the resistance, and leading-out terminal is connect with the leading-out terminal of the capacitor.
Optionally, the overvoltage absorbing device further include:
Unit protection circuit, leading-out terminal are connect with the end of incoming cables of the pressure limiting circuit and the resistance-capacitance circuit, end of incoming cables
It is connect with the end of incoming cables of the scene switch, described device protection circuit is transported to the pressure limiting for cutting off the high voltage bus
The electric current of circuit and the resistance-capacitance circuit.
Optionally, described device protection circuit is fuse.
Optionally, the model HRW5-35KV of the fuse.
The specific embodiment provided according to the present invention, the invention discloses following technical effects: the present invention provides one kind
Shunt capacitor overvoltage absorbing device is slowed down the rate of climb of overvoltage when shunt capacitor throwing is moved back using resistance-capacitance circuit, adopted
The amplitude of overvoltage when moving back, the mistake generated when shunt capacitor branch is thrown and moved back are thrown with pressure limiting circuit limitation shunt capacitor branch
Voltage controls in an ideal range；It effectively avoids, reduce the throwing of shunt capacitor branch when moving back, the overvoltage of generation is to electricity
The impact and negative effect of gas equipment and power grid.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is electrical schematic diagram of the embodiment of the present invention.
Symbol description: scene switch -1, capacitor -2, high voltage bus -3, pressure limiting circuit -4, resistance-capacitance circuit -5, resistance -6,
Capacitor -7, unit protection circuit -8.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of shunt capacitor overvoltage absorbing devices, slow down parallel connection by resistance-capacitance circuit 5
Capacitor branches throw the rate of climb of overvoltage when moving back, and are limited by pressure limiting circuit 4 excessively electric when the throwing of shunt capacitor branch is moved back
Pressure amplitude value, with the high frequency overvoltage that is generated when solving switching parallel capacitor branch to the negative shadow of power grid and electrical equipment
Ring serious problem.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Electrical schematic diagram as shown in Figure 1, overvoltage absorbing device of the present invention are connect with shunt capacitor branch circuit parallel connection,
In, the shunt capacitor branch includes live switch 1 and capacitor 2, the end of incoming cables of the scene switch 1 and high voltage bus 3
Connection；The leading-out terminal of the scene switch 1 is connect with the end of incoming cables of the capacitor 2, the leading-out terminal ground connection of the capacitor 2；
The scene switch 1 and capacitor 2 are live shunt compensation equipment.
Wherein, overvoltage absorbing device of the present invention includes:
Pressure limiting circuit 4, the end of incoming cables of the pressure limiting circuit 4 are connect with the end of incoming cables of the live switch 1, the pressure limiting electricity
The leading-out terminal on road 4 is connect with the leading-out terminal of the capacitor 2；The pressure limiting circuit 4 is used to absorb in parallel in overvoltage effect
Electric energy when capacitor branches overvoltage controls the voltage of the shunt capacitor branch；The pressure limiting circuit 4 is variable resistance
Device；The variable resistance is znr device, and the characteristic of the znr device is, when there is electricity
When pressure is acted on the znr device, the resistance value of the znr device will be reduced to 0, i.e.,
Place branch, short-circuit, when the znr device short circuit, each branch connected in parallel will be all short-circuited, also
It is not subject to the impact of overvoltage；The znr device is for limiting overvoltage when the throwing of shunt capacitor branch is moved back
Shunt capacitor branch is thrown overvoltage when moving back and controlled in an ideal range by amplitude.
Resistance-capacitance circuit 5 is connected in parallel with the pressure limiting circuit 4, in overvoltage effect, storage to be because of the electricity in parallel
Container branch throws the electric energy for moving back the overvoltage of generation, limits the Overvoltage Amplitude of shunt capacitor branch；The resistance-capacitance circuit 5 exists
When generation overvoltage is moved back in the throwing of shunt capacitor branch, slow down the rate of climb of overvoltage；
Wherein, resistance-capacitance circuit 5 of the present invention specifically includes:
Resistance 6 is connect with the end of incoming cables of the live switch 1；In the resistance-capacitance circuit 5, the resistance 6 is by electricity
When pressure acts on, stable electric current is generated, control current value range, avoid that resistance-capacitance circuit 5 is breakdown, damage；
Capacitor 7, end of incoming cables are connect with the leading-out terminal of the resistance 6, and leading-out terminal is connect with the leading-out terminal of the capacitor 2；
The characteristic that there is the capacitor 7 load voltage not to be mutated will not be because of the production of overvoltage when shunt capacitor branch throwing is moved back
Load voltage transition that is raw and leading to the resistance-capacitance circuit 5, in this way, rely on the characteristic of capacitor 7, when overvoltage generates,
The amplitude of overvoltage can exponentially rise, and slow down the rate of climb of overvoltage, avoid overvoltage and rush to circuit
Hit and caused by damage.
In addition, avoiding the overvoltage absorbing device due to fault to protect overvoltage absorbing device of the present invention
Cause economic loss, overvoltage absorbing device of the present invention further include: unit protection circuit, described device protect the leading-out terminal of circuit
Connect with the end of incoming cables of the pressure limiting circuit 4 and the resistance-capacitance circuit 5, described device protect circuit end of incoming cables with it is described existing
The end of incoming cables of field switch 1 connects, and described device protection circuit is transported to the pressure limiting circuit 4 for cutting off the high voltage bus 3
And the electric current of the resistance-capacitance circuit 5；It is fuse that described device, which protects circuit,；The model HRW5-35KV of the fuse.
Fuse fast cut-off circuit when the resistance-capacitance circuit 5 or the pressure limiting circuit 4 break down, by the resistance-capacitance circuit
5 and the isolation of the pressure limiting circuit 4 exit, realize maximum protection to the pressure limiting circuit 4 and resistance-capacitance circuit 5.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For system disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (7)
1. a kind of shunt capacitor overvoltage absorbing device, the overvoltage absorbing device and shunt capacitor branch circuit parallel connection connect
It connects, wherein the shunt capacitor branch includes scene switch and capacitor, the end of incoming cables and high voltage bus that the scene switchs
Connection；The leading-out terminal of the scene switch is connect with the end of incoming cables of the capacitor, the leading-out terminal ground connection of the shunt capacitor；
It is characterized in that, the overvoltage absorbing device includes:
Pressure limiting circuit, the end of incoming cables of the pressure limiting circuit are connect with the end of incoming cables of the scene switch, and the pressure limiting circuit goes out
Line end is connect with the leading-out terminal of the capacitor；The pressure limiting circuit is used to absorb shunt capacitor branch in overvoltage effect
Electric energy when voltage is passed by, the voltage of the shunt capacitor branch is controlled；
Resistance-capacitance circuit is connected in parallel with the pressure limiting circuit, for storing because of the shunt capacitor branch in overvoltage effect
Throw the electric energy for moving back the overvoltage of generation in road.
2. a kind of shunt capacitor overvoltage absorbing device according to claim 1, which is characterized in that the pressure limiting circuit
For variable resistance.
3. a kind of shunt capacitor overvoltage absorbing device according to claim 2, which is characterized in that the variable resistance
Device is znr device.
4. a kind of shunt capacitor overvoltage absorbing device according to claim 1, which is characterized in that the resistance-capacitance circuit
It specifically includes:
Resistance is connect with the end of incoming cables of the scene switch；
Capacitor, the end of incoming cables of the capacitor are connect with the leading-out terminal of the resistance, the leading-out terminal of the capacitor and the capacitor
Leading-out terminal connection.
5. a kind of shunt capacitor overvoltage absorbing device according to claim 1, which is characterized in that the overvoltage is inhaled
Receiving apparatus further include:
Unit protection circuit, described device protect the leading-out terminal of circuit and the inlet wire of the pressure limiting circuit and the resistance-capacitance circuit
End connection, the end of incoming cables of described device protection circuit are connect with the end of incoming cables of the scene switch, and described device protects circuit to use
The electric current of the pressure limiting circuit and the resistance-capacitance circuit is transported in the cutting high voltage bus.
6. a kind of shunt capacitor overvoltage absorbing device according to claim 5, which is characterized in that described device protection
Circuit is fuse.
7. a kind of shunt capacitor overvoltage absorbing device according to claim 6, which is characterized in that the fuse
Model HRW5-35KV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910826403.4A CN110474314A (en) | 2019-09-03 | 2019-09-03 | A kind of shunt capacitor overvoltage absorbing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910826403.4A CN110474314A (en) | 2019-09-03 | 2019-09-03 | A kind of shunt capacitor overvoltage absorbing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110474314A true CN110474314A (en) | 2019-11-19 |
Family
ID=68514696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910826403.4A Pending CN110474314A (en) | 2019-09-03 | 2019-09-03 | A kind of shunt capacitor overvoltage absorbing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110867842A (en) * | 2019-11-27 | 2020-03-06 | 云南电网有限责任公司电力科学研究院 | Overvoltage combined absorption device |
| CN110988751A (en) * | 2019-12-09 | 2020-04-10 | 西安欣东源电气有限公司 | Circuit and method for detecting turn-to-turn short circuit fault of reactor |
| CN111092431A (en) * | 2019-11-19 | 2020-05-01 | 国网浙江省电力有限公司杭州供电公司 | Intelligent variable capacitor with protection function for power grid |
| CN111342440A (en) * | 2020-04-02 | 2020-06-26 | 南京工程学院 | Tokamak plasma breaks and adds thermal field overvoltage protection circuit |
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Cited By (4)
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| CN111092431A (en) * | 2019-11-19 | 2020-05-01 | 国网浙江省电力有限公司杭州供电公司 | Intelligent variable capacitor with protection function for power grid |
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| CN111342440A (en) * | 2020-04-02 | 2020-06-26 | 南京工程学院 | Tokamak plasma breaks and adds thermal field overvoltage protection circuit |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20210909 Address after: 056035 No. 48, Zhonghua North Street, Handan City, Hebei Province Applicant after: HANDAN POWER SUPPLY BRANCH OF STATE GRID HEBEI ELECTRIC POWER SUPPLY Co.,Ltd. Applicant after: STATE GRID CORPORATION OF CHINA Applicant after: XI'AN University OF SCIENCE AND TECHNOLOGY Applicant after: ANHUI ZGD ELECTRIC POWER TECHNOLOGY Co.,Ltd. Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Applicant before: STATE GRID CORPORATION OF CHINA Applicant before: STATE GRID HEBEI ELECTRIC POWER Co.,Ltd. Applicant before: HANDAN POWER SUPPLY BRANCH OF STATE GRID HEBEI ELECTRIC POWER SUPPLY Co.,Ltd. Applicant before: XI'AN University OF SCIENCE AND TECHNOLOGY Applicant before: ANHUI ZGD ELECTRIC POWER TECHNOLOGY Co.,Ltd. |
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Application publication date: 20191119 |